How to calculate the consumption of primer per 1 square. m surface of the wall and floor?

Making the walls and ceiling so that the paint does not peel off, and the surface for many years looked perfect, easy. This task builders solve with the help of innovative compositions that are applied to the surface before painting, puttying and other finishing works.

Primers are used at all stages of the construction and repair of houses and apartments, they are processed surfaces of various materials, walls and floors. This important technological stage prepares the basis for further work and performs the following functions:

• increases the adhesion of the applied material to the base material, thereby increasing the strength of the coating and its service life;
• penetrates into the structure of the main layer and fills microcracks and pores, and during polymerization seals the surface of the base, creating with it a single monolithic structure;
• covers irregularities and potholes, makes the floor smoother, prevents the formation of dust;
• reduces the consumption of paint or other applied composition, saving the budget;
• interferes with reproduction of harmful microflora, a mold and a fungus, rotting of natural materials;
• acts as an excellent hydro insulator;
• increases the resistance of the coating to precipitation, sunlight, chemicals;
• protects the metal from corrosion, it can even be applied to rust, transforming it.

Before buying a primer composition, it is necessary to correctly calculate the right amount of material. The design should take into account a number of factors that affect the amount of primer consumed.

• The composition of the primer mixture, its density. Acrylic universal primer and concrete contact will have different consumption rates per 1 sq. M. m
• Surface type For example, porous mineral surfaces prone to crushing and dusting will absorb more mortar than smooth and slightly absorbent materials.
• The technique of applying a primer, equipment used. Spray consumes composition economically, when priming with a roller consumption increases.
• The required number of layers. Often put 2 or 3 layers.
• Working conditions, indoor or outdoor temperature.

Having estimated all the factors, it is possible to calculate the soil consumption per 1 m2 of the treated surface. Each package of any type of primer composition indicated consumption rates. However, practice shows that the standards set on test benches in manufacturers' laboratories are usually less than the flow rate in more difficult conditions of a real construction site.

Here are the average consumption standards for various compositions for soil, expressed in liters per 1 sq. Km. m:

• bituminous: 200-1000, depending on the type and quality of the base;
• acrylic: 130-150;
• alkyd: 100-130;
• epoxy: 60-100;
• deep penetration primer: 80-160.

It is recommended to add 10% to the basic standards, then multiply the resulting number by the area of ​​the walls or ceiling. The result is the number of liters required for operation. Available in different sizes of packaging (the most common is the volume of 5 liters.). Dry mixes are sold for the weight specified in kg. When dividing the total number of liters by 5, you get the number of cans you need to buy.

When choosing a primer should be borne in mind that different compositions are used for different types of work and materials of the base.There are solutions for external and internal works, and also universal remedies.

Soil mixes differ in the type of binder and additional useful additives, giving the products special properties or the necessary characteristics. Types of primers are as follows:

• Bitumen Primer (rubber-bitumen primer) when applied to the base surface forms a thick waterproofing layer. Thanks to synthetic rubber in the composition, it creates a coating similar to rubber. Such properties allow to use it for the device and repair of a roof. Bitumen is a flammable and toxic material, so you should work with it very carefully. Primer consumption is about 250-300 g per square meter of surface.
• Acrylic Compounds sold ready-made, as well as in the form of a powder, which must be diluted with water according to the instructions. The diluted mixture has the consistency and color of whitewash, so on a dark basis it leaves light streaks. This material is perfect for preparing walls and ceilings for finishing, it goes well under the wallpaper, it is ideally combined with acrylic paints.

• Epoxy primer based on synthetic resin contains anti-corrosion additives and rust converter. Such compositions are developed specifically for the treatment of metal surfaces before painting, can be applied even in the presence of rust. For example, before priming rusty pipes, one should only clean off the peeling and dust from the metal with a stiff brush. The base consumption of such a primer is 60-100 ml per m2.

• Alkyd primer it is used for processing hardboard, chipboard, work with drywall, wood. Its composition contains fungicidal and antiseptic additives that prevent biological damage and the destruction of wood.
• Concrete Contact designed for application on smooth surfaces with low absorbency. It consists of abrasives, which, when the mixture hardens, form a rough coating with high adhesion rates with finishing materials.Means is suitable for concrete, plaster, a brick, creates an excellent covering under a tile.
• Deep penetration primers used to impregnate and strengthen porous and crumbling base materials. Penetrating into all micro-cracks and cracks of concrete, the primer fills them and polymerizes, sealing the surface and giving it strength and moisture resistance.

There is fierce competition in the construction chemistry market, manufacturing companies are fighting for quality and customer loyalty. Russian brands are not inferior to world leaders in popularity and product range, innovative developments and technical characteristics of products.

Among the popular products for priming is the Russian brand "Nortex-Grunt". This water-based composition is ideally combined with acrylic paints and applied to wood, brick, plaster and stone walls and floors. When solidified, it strengthens and increases the adhesion of the base material. The undoubted advantages of the mixture are:

• universality, compatibility with various types of bases;
• the presence of antiseptic additives in the composition;
• the possibility of giving any shade with tinting.

The Optimist brand, well-known to Russian customers, produces a universal composition of acrylic latex with acrylic sand, concrete contact, deep penetration primers, as well as a rich palette of various paints. A wide range and excellent quality allow Optimist products to occupy one of the leading positions in the market of construction chemicals.

The soils of this brand are seriously tested on the stands in the laboratories of the enterprise, which allows you to control the quality of products at all stages of production. A solid scientific base allows innovative developments to find practical application in new formulas.

The compositions of this company are environmentally safe and versatile, as well as affordable. Thanks to these advantages, they receive excellent feedback from builders and are very popular.

Primers "Miners" have proven themselves in the market as high-quality blends with additional beneficial properties. Soils of this brand can be used both indoors and outdoors (for facade work).The composition penetrates deep into the structure of the base, strengthens it, giving the material strength and dedusting it. An even water-repellent film protects the surface even in conditions of high dampness.

Fast drying saves time for repair. Antiseptic properties allow you to get excellent results when processing wood. It is possible to apply to the base of other materials. Buyers note excellent product specifications, good value for money.

If all the calculations have been made, and the primer has been purchased, it is important to treat the base so that the paint lies flat and beautiful, and the coating retains its flawless appearance for a long time. This problem can be solved by doing the work strictly on technology, as well as taking into account the recommendations of experienced specialists in this field.

• On the walls of the primer is applied from the bottom up.
• Before priming it is necessary to prepare the base (level it, clean it of dirt, dust, old paint coats, wash and dry). Metal surfaces should be rust free.

• The sprayer saves a consumption of structure, the roller increases it.
• Before priming, thoroughly clean the lesions of the fungus and dark spots of the mold, additionally treat the affected areas with an antiseptic.
• Hard-to-reach places are easily greased with a fine brush.
• Many manufacturers produce products for successive technological work in whole batches. For example, you can buy plaster, primer and paint of the same brand, fully compatible with each other. Using such series, the owners get a better result.
• You can not dilute the paint with a primer, it does not give the paint the desired properties.
• After applying the first layer of soil should wait for the time indicated on the package, and then apply the subsequent layers.
• When buying a primer, you should ensure the integrity of the package and check the shelf life of the product.

In the next video you will find the secrets of choosing materials and tips from a professional for a perfect primer.